CVE-2021-30633

high KEV

Published 2021-11-03 · Modified 2021-11-03

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

9.5

Description

Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CISA KEV

Vendor: Google
Product: Chromium Indexed DB API
Due date: 2021-11-17

Predictions

Exploit likelihood

99%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

OS impact

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`4.2.2406.44-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`93.0.4577.82-1`
sid	Fixed	`93.0.4577.82-1`
forky	Fixed	`93.0.4577.82-1`
bullseye	Fixed	`93.0.4577.82-1`
bookworm	Fixed	`93.0.4577.82-1`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.